Preprints
https://doi.org/10.5194/egusphere-2025-382
https://doi.org/10.5194/egusphere-2025-382
21 Feb 2025
 | 21 Feb 2025

Brief Communication: Daily, gap-free snow cover information based on a combination of NPP VIIRS and MODIS data

Andreas J. Dietz and Sebastian Roessler

Abstract. Combining Moderate Resolution Imaging Spectroradiometer (MODIS) and Visible Infrared Imaging Radiometer Suite (VIIRS) snow cover data and applying cloud- and data gap interpolation steps can be utilized to generate daily, gap-free snow cover information. Provided by the German Aerospace Center (DLR) under the name “Global SnowPack”, this product has undergone several improvements, comprising the inclusion of NPP VIIRS, a new threshold for the Normalized Difference Snow index (NDSI), and considerable validation. The Global SnowPack offers unique opportunities for analyzing time series of snow cover data since September 2000 and is freely available for visualization and download from DLRs GeoService.

Competing interests: The contact author has declared that neither of the authors has any competing interests.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this paper. While Copernicus Publications makes every effort to include appropriate place names, the final responsibility lies with the authors. Views expressed in the text are those of the authors and do not necessarily reflect the views of the publisher.
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Journal article(s) based on this preprint

16 Sep 2025
Brief communication: Daily, gap-free snow cover information based on a combination of NPP VIIRS and MODIS data
Andreas J. Dietz and Sebastian Roessler
The Cryosphere, 19, 3873–3877, https://doi.org/10.5194/tc-19-3873-2025,https://doi.org/10.5194/tc-19-3873-2025, 2025
Short summary
Andreas J. Dietz and Sebastian Roessler

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2025-382', Anonymous Referee #1, 24 Mar 2025
    • AC1: 'Reply on RC1', Andreas Dietz, 04 Apr 2025
  • RC2: 'Comment on egusphere-2025-382', Ross Palomaki, 09 May 2025
    • AC2: 'Reply on RC2', Andreas Dietz, 07 Jul 2025

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2025-382', Anonymous Referee #1, 24 Mar 2025
    • AC1: 'Reply on RC1', Andreas Dietz, 04 Apr 2025
  • RC2: 'Comment on egusphere-2025-382', Ross Palomaki, 09 May 2025
    • AC2: 'Reply on RC2', Andreas Dietz, 07 Jul 2025

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to minor revisions (review by editor) (10 Jul 2025) by S. McKenzie Skiles
AR by Andreas Dietz on behalf of the Authors (29 Jul 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (31 Jul 2025) by S. McKenzie Skiles
AR by Andreas Dietz on behalf of the Authors (01 Aug 2025)  Manuscript 

Journal article(s) based on this preprint

16 Sep 2025
Brief communication: Daily, gap-free snow cover information based on a combination of NPP VIIRS and MODIS data
Andreas J. Dietz and Sebastian Roessler
The Cryosphere, 19, 3873–3877, https://doi.org/10.5194/tc-19-3873-2025,https://doi.org/10.5194/tc-19-3873-2025, 2025
Short summary
Andreas J. Dietz and Sebastian Roessler
Andreas J. Dietz and Sebastian Roessler

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The "Global SnowPack" product of the German Aerospace Center (DLR) contains binary information about the presence or absence of snow on a global scale since the year 2000. Now incorporating new input datasets, it was possible to increase the spatial resolution to 370 m. The detailed accuracy assessment proves the feasibility of the applied methods to remove data gaps caused by clouds and polar darkness.
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